Custom-built real-time imaging solutions (I2I - phase 1)

定制的实时成像解决方案（I2I - 第 1 阶段）

• 批准号: 538562-2019
• 负责人: VanDerBaan, Mirko
• 金额: $ 8.74万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Idea to Innovation
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693135
• 关键词: Custom; built; real; time; imaging

Hydraulic fracturing and horizontal drilling have dramatically changed the energy landscape in North America;shale plays that were previously deemed uneconomic are now developed extensively. Hydraulic fracturingcreates new fractures or pops open existing ones, improving fluid flow and thus reservoir drainage. Local rockfailure or slip yields an acoustic emission, which is also known as a microseismic event. Microseismicmonitoring during hydraulic fracturing is a common surveillance technology to record real-time information onin situ rock deformation and failure in order to ensure safe and effective hydraulic fracturing operations.Event localization plays an important role in microseismic monitoring. Reverse-time extrapolation is apowerful full-waveform imaging technique that takes recorded wavefields, reverses the time axis and thenback-propagates the observed data to the original source locations. The procedure is analogous to playing amovie back in time to see how it all started. The technique has proven very robust for imaging subsurfacegeology using reflection seismic data but it is only rarely applied to microseismic data because itscomputational demands render real-time imaging highly challenging.Model-order reduction can accelerate online computations by orders of magnitude, leading to faster imagingsolutions, strongly reduced needs for significant computation power in the field, as well as automated results,thus reducing manual labor. The new technology thus promises cost savings on both labor and hardwarerequirements in the field. This project will evaluate the commercial viability of the technology for real-timemicroseismic monitoring. A Canadian patent application on the use of reduced-order systems for microseismicevent localization has already been filed.

水力压裂和水平钻井极大地改变了北美的能源格局;以前被认为不经济的页岩油气田现在得到了广泛开发。水力压裂会产生新的裂缝或打开现有的裂缝，改善流体流动，从而改善储层排水。局部岩石破裂或滑动产生声发射，也称为微震事件。水力压裂过程中的微震监测是一种常用的监测技术，用于记录现场岩石变形和破坏的实时信息，以保证水力压裂作业的安全和有效进行，事件定位在微震监测中起着重要的作用。逆时外推是一种强大的全波形成像技术，它采用记录的波场，反转时间轴，然后将观测数据反向传播到原始源位置。这个过程类似于播放电影，看看这一切是如何开始的。该技术已被证明是非常强大的成像subsurface地质使用反射地震数据，但它很少被应用到微震数据，因为它的计算需求呈现实时成像极具挑战性。模型阶数减少可以加速在线计算的数量级，导致更快的imagingsolutions，大大降低了需要显着的计算能力，在外地，以及自动化的结果，从而减少人工劳动。因此，这项新技术有望在该领域节省劳动力和硬件需求的成本。该项目将评估实时微震监测技术的商业可行性。一项关于使用降阶系统进行微震事件定位的加拿大专利申请已经提交。